fuel sending unit question

i have a 72 k5 and i have the the poly tank in it. i have installed VDO millenium guages. i dropped my tank to install the sending unit and realized that the stock one has the suction tube built into it. on the one that came with the VDO guages is just the sending unit(with no suction tube). has anyone else had this problem with their aftermarket guages? if so, how did you fix it?

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